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Probability
The probability of a certain event is a number expressing the likelihood that a specific event will occur, expressed as the ratio of the number of actual occurrences to the number of possible occurrences. In mathematics, it is a measure of how often an event will happen and is the basis of statistics.
14,643 Questions
Does standard deviation have to be between 0 and 1?
Standard deviation doesn't have to be between 0 and 1.
What does the expected value of a binomial distribution with n trials tell you?
average number of successes
99.7% of scores fall within -3 and plus 3 standard deviations around the mean in a normal distribution.
How many different ways can you arrange 4 books on a shelf?
Numbering books as A,B, C, and D then the variations are:
- ABCD
- ABDC
- BACD
- BADC
- CDAB
- CDBA
- DCAB
- DCBA
- BCAD
- BCDA
- CBAD
- CBDA
- ADBC
- ADCB
- DABC
- DACB
- BDAC
- BDCA
- DBAC
- DBCA
- ACBD
- ACDB
- CABD
- CADB
How many permutations are possible of the word great?
the word great has 5 different letters..
so at 1st place 5 different letters can exist, at 2nd, left 4 letters can exist, at 3rd.. 3 left letters, at 4th, 2 left letters and 5th ..1 left letter..
so for permutation... we do possible options at 1st place X possible options at 2nd place ... and so on till X possible options at 5th place.
= 5 X 4 X 3 X 2 X 1
=20 X 6
= 120
so the word great has 120 possible permutations.
What is the probability of rolling an even number on a number cube labeled 1 through 6?
1/2 - you have a 50-50 chance of rolling an even number (or an odd number for that matter !)
How do you Give the probability in simplest form?
First you have to give the probability as a fraction. Then, you can simplify it by dividing the numerator and denominator by a number until it is reduced to the simplist terms
For example, 40/50 can be reduced to 4/5 chance- but it is still the same
64.
What is the distance of deneb?
According to Wikipedia, Deneb's exact distance from the Earth is uncertain, which makes determining many of Deneb's other properties similarly imprecise. However, the uncertainty has been dramatically reduced upon analysis of the New Hipparcos Data Reduction in 2007. One 2008 study puts the most likely distance at 1,550 light-years, but there is still a considerable uncertainty of more than 10%. The reduced parallax uncertainties do not rule out a distance as close as 1,340 light-years or as far as 1,840 light-years. It is the farthest first-magnitude star from Earth.
What is it called when you find the probability that something won't happen?
Its called confidence. For instance a girl kept her keys on the dinning table where other friends saw her keeping it, now when she comes after a gap of two minutes after serving herself, the keys were gone, five people checked the entire flat, it was nowhere. Then you check your flat, its not there, someone in the morning comes to return the keys. What is the point of doing that when one had to break the lock a day before.
Alternate Answer:
Probability is a statistics based number that expresses numerically, and as a result of scientific measure and study, the likelihood that an event will occur. the process of arriving at a measure of likelihood of whether or not an event will or will not happen is called "developing a theory of probability." This number can be represented by either a ratio, or by a percentage. For example 1:1 would be ratio of probability that if you put your keys on the dining room table, and nobody else is at home, the keys will stay on the table. Introducing additional degrees of freedom to the equation, such as other people of nefarious backgrounds, or even a cat or a parrot, will alter the statistical probability that the keys will remain stationary. The lower the ratio, it becomes less statistically likely, or probable, that the keys will remain stationary. For example, our theory of probability may state that "With a kitten in the house that likes to get on top of the furniture and play with shiny things, the likelihood of the keys remaining stationary is 100,000:1; or very nearly 0%" Alternately, with a slight tweak to how the theoretical probability is stated, we can take the same exact number, invert it, and provide an inverse statistical probability. For example, we may say that, based on the criminal background of our house guest, the statistical probability is 100% that you will have to have new keys made for your apartment.
Is it possible to throw a zero when you roll a die?
Depends on what kind of dice you have, if a standard dice it's not possible
What is the number of permutations of the letters in the word quiet?
5! = 5*4*3*2*1 = 120 different permutations of the letters in the word quiet.
Permutations are like combinations, only we're saying that order matters (if you're having trouble remembering which is which, think about it this way--if you're getting a perm, the order of the steps is important). So, in short, quiet is different from quite, which is different from teiuq, because the letters are in a different order.
The formula for permutations is nPr = n! over (n-r)! where n is the number of things you have to choose from and r is the number of things you're choosing. Since you're rearranging all the letters in quiet, you have 5P5 = 5! over 0!. 0! = 1 (by definition--think about it this way, how many ways can you choose 0 things? Just 1--don't pick any of them) so your problem simplifies down to just 5!, which I answered above.
What is the probability of an event that is certain to happen?
The probability of a certainty is 1. (100%)
What is the probability of choosing a letter from the word probability?
Since the word "probability" contains only letters, then the probability of choosing a letter from the word "probability" is 1, i.e. it is certain to happen.
What is the probability of an odd number?
There is insufficient information for us to even begin to understand this question. Please edit the question to include more context or relevant information. The answer depends on whether you are referring to rolling a die (or dice), or a spinner, or drawing a card from a deck of playing cards.Since you have not bothered to share that crucial bit of information, I cannot provide a more useful answer.
It is true. Because the normal distribution is above the horizontal axis for all values, the area under it is a positive quantity no matter the z value.
What is the intersection of the assessed probability and severity of a hazzard called in the crm?
When implementing controls in the CRM process, which is the best to use
A union probability is denoted by P(X or Y), where X and Y are two events. P(X or Y) is the probability that X will occur or that Y will occur or that both X and Y will occur. The probability of a person wearing glasses or having blond hair is an example of union probability. All people wearing glasses are included in the union, along with all blondes and all blond people who wear glasses.
According to Professor Franz Kurfess of California Polytechnic State University, San Luis Obispo, union probability of two independent events A and B can be denoted as:
P(A ∪ B) = P(A) + P(B) - P(A ∩ B)
= P(A) + P(B) - P(A) * P (B)
It will be seven, the most likely score when throwing two normal dice. This is because there more combinations possible for seven than any other score. For example, scoring a total of 12 or 2 are the least likely as only one combination will give these, two 1's or two sixes, out of the 36 possible combinations. There are six ways of achieving 7 though, so six chances in 36, or a 1 in 6 chance. The cards don't really come into the problem, maybe this is a red herring.
